Or it could be that there are kanoim who are anti Chabad, which is the more likely scenario. A few years ago there was an asifa against Mayonie where the Mishkanos Haroim Rebbe spoke (or was his brother the Porisover) and others about the dangers of Chabad and the risks of a slippery slope etc.
Certain parts of the Chassidishe and Litvish crowd who would oppose a person learning Chabad Chassidus on his own in private, for ideological reasons or for the understandable fear of the person taking it further. What is to be gained in denying that fact?

could be the reason vizhintz and others expelled the kids is due to the fact the they are part of a diffrend so called “Chassidus”? maybe if the whole place wouldn’t become what it is now and would stay on the course of its original founders they would never throw out any kids cause its not a chassidus with shuls rather only shiurim…

One of the reasons Mayonei developed is because yungerleit were pushed out of their kehillos. Remember when the Vizhnitzer Rebbe of Beit Shemesh expelled all the Mayonei children from his cheder. Social pressure is much stronger in some polisher kehillos. If you don’t toe the line you’re ostracized. In such cases, Mayonei serves as an alternative.

But in friendlier groups like Boyan, Machnovk, Dushinsky you are correct. Yungerleit can remain where they are and learn Chassidus. They even have kollelim for Chassidus under their own rubric.

if its right what your saying then why do they need a own network, they should each stay where they are and let it become a נחלת הכלל by staying where they are and not becoming they’re own so called “chassidus”??

It depends who you’re talking about not forfeiting a connection to the Rebbe. Regarding the members of Mayonie Yisroel I would agree. They learn the Rebbe’s Torah and arrange trips to the Ohel etc.

But what about groups like R’ Menachem Ehrlangers chaburah. They are seemingly anti dor hashvi’yi. Is it wonderful that they learn the maamorim of the Rabe’im? Yes, definitely. But are they forfeiting? Also yes.

How about R’ Sheinberger’s group? Or R’ Kluger? This is by no means a monolithic movement.